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Product Detailed Parameters
- Description：IC REG CTRLR BUCK 14DIP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Output Type：Transistor Driver
- Function：Step-Down
- Output Configuration：Positive
- Topology：Buck
- Number of Outputs：1
- Output Phases：1
- Voltage - Supply (Vcc/Vdd)：3.5V ~ 20V
- Frequency - Switching：Up to 250kHz
- Duty Cycle (Max)：100%
- Synchronous Rectifier：Yes
- Clock Sync：No
- Serial Interfaces：-
- Control Features：Current Limit, Enable
- Operating Temperature：0°C ~ 70°C (TA)
- Mounting Type：Through Hole
- Package / Case：14-DIP (0.300", 7.62mm)
- Supplier Device Package：14-PDIP
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Overview
The LTC1148CN#PBF is a high-efficiency synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.5 V to 20 V and provides a fixed output voltage of 3.3 V at up to 2 A output current. The device features a 250 kHz switching frequency and low quiescent current of 160 µA. It includes current limit, enable control, and 100% duty cycle capability. Operating temperature ranges from 0°C to +70°C in a PDIP-16 package.
Feature Summary
- Synchronous rectification for high efficiency
- Fixed 3.3 V output voltage option
- Integrated current limit and enable control
Applications
- Portable computer power supplies
- Hand-held equipment power systems
- Battery-powered system regulation
Procurement Notes
Verify the specific suffix #PBF indicates lead-free compliance and RoHS status. Confirm the fixed 3.3 V output variant matches design requirements. Check availability as distribution may be limited or restricted in certain regions. Ensure the PDIP-16 through-hole package fits the target PCB layout constraints.
Selection Notes
Select this component when a fixed 3.3 V output is required from a 3.5 V to 20 V input source. The synchronous topology suits applications prioritizing efficiency over adjustable output flexibility. Consider the 250 kHz frequency for balancing component size and EMI. Verify thermal performance for the intended load current within the commercial temperature range.
Part Context
This part belongs to the LTC1148 family of high-frequency buck converters designed for portable electronics. It shares core architecture with variants offering different fixed outputs like 5 V or 3.5 V. The CN suffix denotes the commercial temperature grade and PDIP-16 package type. It serves as a compact solution for replacing linear regulators in battery-operated devices.
Replacement Considerations
Direct substitutes include other LTC1148 variants with different fixed output voltages if the voltage level can be adjusted. Cross-reference with newer Analog Devices synchronous buck regulators for improved efficiency or smaller packages. Verify pin compatibility before substituting with non-Analog Devices parts.
